package com.lagou.web.servlet;

import com.lagou.base.Constants;
import com.lagou.pojo.Course;
import com.lagou.service.CourseService;
import com.lagou.service.impl.CourseServiceImpl;
import com.lagou.utils.DateUtils;
import com.lagou.utils.UUIDUtils;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@WebServlet("/courseSalesInfo")
public class CourseSalesInfoServlet extends HttpServlet {
    /**
     *保存课程营销信息
     */
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        try {
            //1.创建Course对象
            Course course=new Course();
            //2.创建Map集合，用来收集数据
            Map<String,Object> map=new HashMap<>();
            //3.创建磁盘工厂对象
            DiskFileItemFactory factory=new DiskFileItemFactory();
            //4.文件上传核心对象
            ServletFileUpload fileUpload=new ServletFileUpload(factory);
            //5.解析request对象，获取表单项集合
            List<FileItem> list=fileUpload.parseRequest(req);
            //6.遍历集合 判断哪些是普通表单项，哪些是文件表单项
            for (FileItem item : list) {
                boolean formField=item.isFormField();
                if(formField){
                    //是普通表单项，获取表单中的数据，保存到map
                    String fieldName=item.getFieldName();
                    String value=item.getString("UTF-8");
                    System.out.println(fieldName+" "+value);
                    //使用map收集数据
                    map.put(fieldName,value);
                }else{
                    //文件上传项
                    //获取文件名
                    String fileName=item.getName();
                    String newFileName= UUIDUtils.getUUID()+"_"+fileName;
                    //创建输入流
                    InputStream in=item.getInputStream();
                    //获取Webapps的目录路径
                    String realPath=this.getServletContext().getRealPath("/");
                    String wabappsPath=realPath.substring(0,realPath.indexOf("lagou_edu_home_war"));
                    //创建输出流
                    OutputStream out=new FileOutputStream(wabappsPath+"/upload/"+newFileName);

                    IOUtils.copy(in,out);
                    out.close();
                    in.close();

                    //将图片路径进行保存
                    map.put("course_img_url", Constants.LOCAL_URL +"/upload/"+newFileName);
                }
            }
            BeanUtils.populate(course,map);
            String dateFormart= DateUtils.getDateFormart();
            //使用BeanUtils将map中的数据封装到COURSE对象
            CourseService cs=new CourseServiceImpl();
            if(map.get("id")!=null){
                course.setCreate_time(dateFormart);
                String result = cs.updateCourseSalesInfo(course);
                resp.getWriter().print(result);
            }else{
                //补全信息

                course.setCreate_time(dateFormart);
                course.setUpdate_time(dateFormart);
                course.setStatus(1);
                //业务处理
                String result=cs.saveCourseSalesInfo(course);
                //相应结果
                resp.getWriter().print(result);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        doGet(req, resp);
    }
}
